// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gin/converter.h"

#include <limits.h>

#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "gin/public/isolate_holder.h"
#include "gin/test/v8_test.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "v8/include/v8.h"

namespace gin {

using v8::Array;
using v8::Boolean;
using v8::HandleScope;
using v8::Integer;
using v8::Local;
using v8::Null;
using v8::Number;
using v8::Object;
using v8::String;
using v8::Undefined;
using v8::Value;

typedef V8Test ConverterTest;

TEST_F(ConverterTest, Bool)
{
    HandleScope handle_scope(instance_->isolate());

    EXPECT_TRUE(Converter<bool>::ToV8(instance_->isolate(), true)->StrictEquals(Boolean::New(instance_->isolate(), true)));
    EXPECT_TRUE(Converter<bool>::ToV8(instance_->isolate(), false)->StrictEquals(Boolean::New(instance_->isolate(), false)));

    struct {
        Local<Value> input;
        bool expected;
    } test_data[] = {
        { Boolean::New(instance_->isolate(), false).As<Value>(), false },
        { Boolean::New(instance_->isolate(), true).As<Value>(), true },
        { Number::New(instance_->isolate(), 0).As<Value>(), false },
        { Number::New(instance_->isolate(), 1).As<Value>(), true },
        { Number::New(instance_->isolate(), -1).As<Value>(), true },
        { Number::New(instance_->isolate(), 0.1).As<Value>(), true },
        { String::NewFromUtf8(instance_->isolate(), "").As<Value>(), false },
        { String::NewFromUtf8(instance_->isolate(), "foo").As<Value>(), true },
        { Object::New(instance_->isolate()).As<Value>(), true },
        { Null(instance_->isolate()).As<Value>(), false },
        { Undefined(instance_->isolate()).As<Value>(), false },
    };

    for (size_t i = 0; i < arraysize(test_data); ++i) {
        bool result = false;
        EXPECT_TRUE(Converter<bool>::FromV8(instance_->isolate(),
            test_data[i].input, &result));
        EXPECT_EQ(test_data[i].expected, result);

        result = true;
        EXPECT_TRUE(Converter<bool>::FromV8(instance_->isolate(),
            test_data[i].input, &result));
        EXPECT_EQ(test_data[i].expected, result);
    }
}

TEST_F(ConverterTest, Int32)
{
    HandleScope handle_scope(instance_->isolate());

    int test_data_to[] = { -1, 0, 1 };
    for (size_t i = 0; i < arraysize(test_data_to); ++i) {
        EXPECT_TRUE(Converter<int32_t>::ToV8(instance_->isolate(), test_data_to[i])
                        ->StrictEquals(
                            Integer::New(instance_->isolate(), test_data_to[i])));
    }

    struct {
        v8::Local<v8::Value> input;
        bool expect_sucess;
        int expected_result;
    } test_data_from[] = {
        { Boolean::New(instance_->isolate(), false).As<Value>(), false, 0 },
        { Boolean::New(instance_->isolate(), true).As<Value>(), false, 0 },
        { Integer::New(instance_->isolate(), -1).As<Value>(), true, -1 },
        { Integer::New(instance_->isolate(), 0).As<Value>(), true, 0 },
        { Integer::New(instance_->isolate(), 1).As<Value>(), true, 1 },
        { Number::New(instance_->isolate(), -1).As<Value>(), true, -1 },
        { Number::New(instance_->isolate(), 1.1).As<Value>(), false, 0 },
        { String::NewFromUtf8(instance_->isolate(), "42").As<Value>(), false, 0 },
        { String::NewFromUtf8(instance_->isolate(), "foo").As<Value>(), false, 0 },
        { Object::New(instance_->isolate()).As<Value>(), false, 0 },
        { Array::New(instance_->isolate()).As<Value>(), false, 0 },
        { v8::Null(instance_->isolate()).As<Value>(), false, 0 },
        { v8::Undefined(instance_->isolate()).As<Value>(), false, 0 },
    };

    for (size_t i = 0; i < arraysize(test_data_from); ++i) {
        int32_t result = std::numeric_limits<int32_t>::min();
        bool success = Converter<int32_t>::FromV8(instance_->isolate(),
            test_data_from[i].input, &result);
        EXPECT_EQ(test_data_from[i].expect_sucess, success) << i;
        if (success)
            EXPECT_EQ(test_data_from[i].expected_result, result) << i;
    }
}

TEST_F(ConverterTest, Vector)
{
    HandleScope handle_scope(instance_->isolate());

    std::vector<int> expected;
    expected.push_back(-1);
    expected.push_back(0);
    expected.push_back(1);

    auto maybe = Converter<std::vector<int>>::ToV8(
        instance_->isolate()->GetCurrentContext(), expected);
    Local<Value> js_value;
    EXPECT_TRUE(maybe.ToLocal(&js_value));
    Local<Array> js_array2 = Local<Array>::Cast(js_value);
    EXPECT_EQ(3u, js_array2->Length());
    for (size_t i = 0; i < expected.size(); ++i) {
        EXPECT_TRUE(Integer::New(instance_->isolate(), expected[i])
                        ->StrictEquals(js_array2->Get(static_cast<int>(i))));
    }
}

} // namespace gin
